Pressure-equalizing valve



March 31, 1931. H. F. RODLER 1,798,631

- PRESSURE EQUALIZING' VALVE Filed May 14, 9 6

TOBUR/Vg/P v /9- /5 6/5/0 /'7// /a 201 FIE-f1 'FIE -E I H. F POOLE}? INVENTOR ATTORNEY Patented Mar. 31, 1931 UNITED STATES PATENT OFFICE- HILMER F. RODLER, OF DAVENPORT, IOWA, ASSIGNOR TO CALVIN J. MUMMERT, OF WEST NEW YORK, NEW JERSEY PRESSURE-EQUALIZING VALVE Application filed May 14,

My present invention relates more especially, though it is not limited to such use, to a valve designed to maintain a constant pressure upon a fuel being delivered to an oil L1 burner apparatus. Broadly, it pertains to a construction capable of permitting a liquid to flow under constant pressure through a fluid carrying pipe. Among the objects of this invention are to provide means whereby fluid 1Q flowing from a source of supply to a point of consumption may be delivered at a constant pressure; to provide mechanism whereby fluid flowing from a source of supply to a point of consumption may be delivered at a constant pressure and the excess supply of fluid will be carried back to a storage reservoir; to provide means of the character indicated in which there is provision for adjusting the pressure at which the fluid will be delivered; and such objects, advantages and capabilities as will hereafter appear and as are inherent in the construction disclosed herein. My invention further resides in the combination, construction and arrangement of parts illustrated in the accompanying drawing and, while I have shown therein what is now considered a preferred form of embodiment of my invention, I desire the same to be understood as illustrative only and not as limiting said invention.

In the drawing annexed hereto and forming a part hereof, Figure 1 is a longitudinal central horizontal section through a device constructed in accordance with my invention, and Figure 2 is an elevation thereof showing the same attached to the delivery end of a pump.

Referring more in detail to this drawing, numeral 1 designates the body portion or section of this device, 2 the delivery end of a pump for supplying oil and. 3 a pipe connecting the pump with the inlet opening 4: extending substantially centrally through the boss 5 on the body 1. Other bosses, 6 and 7, are arranged upon opposite sides of the body 1 and have their axes at right angles to the axis of boss 5. These bosses are perforated substantially axially as shown in Figure 1 and provided with threads whereby they may be connected,.respectively, to an oil burner 1926. Serial No. 109,139.

and to a-storage tank. While I have shown these bosses as extendin in opposite directions, it will of course %)8 understood that they may be extended in any desired direction, either that shown, or in the same direction, or in any intermediate direction.

The-body 1 is perforated axially and has a compartment 8 with which the opening 4 communicates. Casing members 9 and 10 slotted, respectively, at 9a and 10a extend longitudinally into the ends of the body memher, being seated in the perforation therein and preferably are connected to the body member 1 by screw threading, as shown at 11. These valve members are provided with angular flanges as shown at 12 whereby they may be screwed into place in the body 1. Each casing member is provided with a cap 13 which serves to cover and protect the adjusting screw 14 mounted in each of the casing members 9 and 10.

The casing members 9 and 10 are axially perforated and are provided with seats 15 against which the balls 16 may be pressed by the springs 17 which rest at one end against the balls 16 and at their other end against the inner extremities of the screw-threaded plugs 14. These plugs, as clearly shown in Figure 1, are provided with projections 18 whereby the springs ma be held properly positioned. If it is desired to change the pressure at which the valves open to permit the flow of oil therethrough the caps 13 are removed and a wrench is applied to the head 19 or 20, as desired, and the plug is screwed in or out to secure the proper adjustment, which may be tested in any desired way.

In practice, a pipe 3 is screwed into open ing 4 and is connected with the pump delivery opening and then pipes leading to the burner and to the storage tank are connected with the openings in the bosses 6 and 7. Now, when the pump is started, oil will be forced through pipe 3 and opening 4 into chamber 8. From here, oil will pass out through the openings in casings 9 and 10 closedby the balls 16, when the pressure in the chamber 8 exceeds the pressure for which the valves are set. For example, if it is desired to feed oil to the burner at a pressure of two pounds, the plugs 14 are adjusted until the desired pressure is delivered in the apart in the independent pipes leading to the burner and to the storage tank.

The return valve, because of the less pressure of its spring 17, moves back away from its seat some distance before the other valve opens, and then, owing to the slot in the side of member 10, there is substantially unrestricted flow of oil to the return pipe while the flowthrough the other valve remains restricted, since ball 16 has not yet backed away from its seat far enough to permit unrestricted flow through the valve, the slot not yet being uncovered by the ball moving backward. In other words, when the ballsmove awa from their seats there is a slow increase in t e rate of flow until the ball of the re;-

turn valve uncovers the slot in sleeve 10. There is then a sudden increase in the flow aperture and carrying capacity on this side of the regulator which results in taking care of the surplus oil. Any slight increase in pressure, then, upon the two sides of the device wil l increase the flow aperture in the return line so much faster than in the burner line that there cannot be any marked increase in flow to the burner or increase in pressure in the burner feed pipe.

Back pressure from the burner valve upon the all 16 on the burner side of this device tends to neutralize; the pressure effect from chamber 8, thus preventing this ball from moving away from its seat farther than necthrough the pipe. On the return side there is substantially no resistance and therefore no back pressure tending to hold ball 16 against its seat (other than the spring 17).

Regardless of thepressurein chamber 8, the

ball 16 on the burner side of the device will not move away from its seat unless there is opportunity for oil to escape from this side that is, opportunity for flow. The open 'ing pressure on this ballwill be the difference between forward pressure and back pressure, the latter being composed of two elements the p'ressureof spring 17 and the back pressure of the oil. If the burner valve is closed so that no oil can escape, then the back pressure of the oil (when oil is flowing through the device) will equal the forward pressure of the oil, and the total back pressure will exceed the "forward pressure and the valve willnot open. However, so soon as the burner valve is opened the oil begins to flow and its back pressure is decreased to a point such that the regulator valve on the burner side opens simultaneously therewith and permits oil to flow.

It is of course understood that the specific 4 claim 1.. A structure of the character indicated including a casing having an internal cavity,

an inlet port opening into said cavity and outlet ports opening therefrom and adapted to be connected to delivery pipes for the carrying of fluid passing through said structure, said casing having a pair of valve members controlling the passageways between the inlet and the. outlets, said valve members having slots to be opened in varying amounts as the valve closure means is moved backward from the seats,

2. A pressure regulator of the character'indicated comprising a body having an internal cavity into which opens aninlet port, said body having exit ports through the lateral walls thereof, the connections between the cavity and the exit ports being controlled by pressure check valves which are adjustable to open at various pressures, and which prevent back pressure from causing them to be unseated.

3. A pressure equalizing valve comprising a longitudinally apertured body having lateral inlet and exit ports extending from the surface of the body to the aperture therein, casing members extending into the longitudinal aperture and having threaded connecmembers to the-exit ports, spring pressed valve elements within said casing members and closing the valve openings, and adjustable means for varying thetension on the springs to vary the pressure at which the valves will 0 en.

4. In a vave, a longitudinally apertured body having a pluralit of openings extending laterally from the ongitudinal aperture through thewall of the body, inlet and exit pipes connected to said openings, hollow casing elements extending lengthwise into the longitudinal aperture and independently removable therefrom, said casing elements having therein resiliently seated check elements, and means in the casing elements for adjusting the opening pressure of the check elements. s

5. A pressure regulator of the character indicated comprising a longitudinally apertured body, a valve assembly extending 7 tion with the body member, said casing memlengthwise into each end of the aperture in the body and each removable independently of the other, the valve assemblies comprising longitudinally apertured body elements having valve seats at their inner ends, check elements restin against said seats, springs resiliently holdmg the check elements against their seats, and means for adjusting the pressure of the springs.

6. A pressure regulator of the character indicated comprising a longitudinally apertured body, a valve assembly extending lengthwise into each end of the aperture in v the body, the valve assemblies comprising longitudinally apertured body elements having valve seats at their inner ends, check elements resting against said seats, springs resiliently holding the check elements against their seats, and means for adjusting the pressure of the springs, said longitudinally extending body elements of the valve assemblies having laterally directed openings by means of which the flow through the valves -may be increased rapidly by the unseating of the check elements from their seats.

In witness whereof, I hereunto subscribe my name to this s ecification.

' HIELMER F. RODLER. 

